A path management method and controller
A path management and controller technology, applied in the field of communication, which can solve the problem that the optimal path across multiple ASs cannot be calculated.
Active Publication Date: 2017-11-24
HUAWEI TECH CO LTD
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Problems solved by technology
The RR only has the routing information in the AS, so when a communication device needs to communicate across ASs, the RR in the AS that the communication passes through has only the routing information in the AS, so it cannot calculate the routing information across multiple ASs. AS optimal path
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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0056] In this embodiment of the present invention, a connection between ASs may refer to a communication protocol connection, for example, through an external border gateway protocol (External Border Gateway Protocol, EBGP), and a connection between devices may also refer to a connection through a protocol Connection, for example: connection through IBGP or EBGP or Border Gateway Protocol (Border Gateway Protocol, BGP).
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The embodiment of the present invention discloses a path management method, including: the controller obtains the first topology information of the first autonomous system AS, and establishes the internal topology of the first AS according to the first topology information; The second topology information of the connection between an AS, and establish the first external topology of the connection between the second AS and the first AS according to the second topology information; the controller acquires the third topology information of the connection between the third AS and the first AS, and establish The second topology information establishes the second external topology for the connection between the second AS and the first AS; the controller combines the internal topology, the first external topology and the second external topology to obtain a logical topology; the controller combines the logical topology calculation to connect the second AS and the optimal path of the third AS. Correspondingly, the embodiment of the present invention also provides a controller. The embodiment of the present invention can calculate the optimal path across multiple ASs.
Description
technical field [0001] The invention relates to the communication field, in particular to a path management method and a controller. Background technique [0002] The Internet includes multiple autonomous systems (Autonomous System, AS). In one AS, a router acts as a route reflector (Route Reflector, RR), and other routers act as clients (Client). An Internal Border Gateway Protocol (Internal Border Gateway Protocol, IBGP) connection is established between the client computer and the route reflector. Since the RR reflects routing information between clients, there is no need to establish a BGP connection between clients. The RR only has the routing information in the AS, so when a communication device needs to communicate across ASs, the RR in the AS that the communication passes through has only the routing information in the AS, so it cannot calculate the routing information across multiple ASs. The optimal path of AS. Contents of the invention [0003] Embodiments of...
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IPC IPC(8): H04L12/733H04L12/751H04L45/122H04L45/02
Inventor 庄顺万于凤青白涛王丽丽欧阳沅斌
Owner HUAWEI TECH CO LTD